GHSA-f5vp-w269-392g: Coder vulnerable to denial of service via unbounded request body in AI Bridge provider endpoints
A denial of service vulnerability exists in the AI Bridge provider endpoints of github.com/coder/coder/v2 where request bodies are read without size limits. An authenticated user with access to AI Bridge endpoints can send an arbitrarily large request body, causing memory exhaustion and crashing the control plane process. This affects versions in the 2.33 and 2.34 release lines prior to v2.33.8 and v2.34.2 respectively. The issue requires authenticated access and the AI Bridge feature to be enabled.
AI Analysis
Technical Summary
The AI Bridge provider handlers in github.com/coder/coder/v2 read request bodies using io.ReadAll without imposing a maximum size limit. This allows an authenticated user with AI Bridge access to send very large or chunked request bodies to endpoints such as /api/v2/aibridge/anthropic/v1/messages, leading to heap memory exhaustion. Since AI Bridge runs in-process with the coderd service, this results in the termination of the entire control plane process, including API, workspace coordinator, and DERP relay components. The vulnerability affects only versions in the 2.33 and 2.34 release lines prior to v2.33.8 and v2.34.2. The fix involves applying http.MaxBytesReader or an equivalent limit to cap request body size before reading.
Potential Impact
An authenticated user with AI Bridge access can cause a denial of service by sending an unbounded large request body, exhausting heap memory and crashing the coderd process. This disrupts the entire control plane, impacting availability of the API, workspace coordinator, and DERP relay. There is no impact on confidentiality or integrity. Exploitation requires authenticated access and the AI Bridge feature enabled.
Mitigation Recommendations
A fix is available in github.com/coder/coder/v2 versions v2.33.8 and later on the 2.33 release line, and v2.34.2 and later on the 2.34 release line. Users should upgrade to these versions to mitigate the vulnerability. No workarounds are available. Since this is not a cloud service, users must apply the patch themselves.
GHSA-f5vp-w269-392g: Coder vulnerable to denial of service via unbounded request body in AI Bridge provider endpoints
Description
A denial of service vulnerability exists in the AI Bridge provider endpoints of github.com/coder/coder/v2 where request bodies are read without size limits. An authenticated user with access to AI Bridge endpoints can send an arbitrarily large request body, causing memory exhaustion and crashing the control plane process. This affects versions in the 2.33 and 2.34 release lines prior to v2.33.8 and v2.34.2 respectively. The issue requires authenticated access and the AI Bridge feature to be enabled.
CVSS v3.1
Affected software
Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The AI Bridge provider handlers in github.com/coder/coder/v2 read request bodies using io.ReadAll without imposing a maximum size limit. This allows an authenticated user with AI Bridge access to send very large or chunked request bodies to endpoints such as /api/v2/aibridge/anthropic/v1/messages, leading to heap memory exhaustion. Since AI Bridge runs in-process with the coderd service, this results in the termination of the entire control plane process, including API, workspace coordinator, and DERP relay components. The vulnerability affects only versions in the 2.33 and 2.34 release lines prior to v2.33.8 and v2.34.2. The fix involves applying http.MaxBytesReader or an equivalent limit to cap request body size before reading.
Potential Impact
An authenticated user with AI Bridge access can cause a denial of service by sending an unbounded large request body, exhausting heap memory and crashing the coderd process. This disrupts the entire control plane, impacting availability of the API, workspace coordinator, and DERP relay. There is no impact on confidentiality or integrity. Exploitation requires authenticated access and the AI Bridge feature enabled.
Mitigation Recommendations
A fix is available in github.com/coder/coder/v2 versions v2.33.8 and later on the 2.33 release line, and v2.34.2 and later on the 2.34 release line. Users should upgrade to these versions to mitigate the vulnerability. No workarounds are available. Since this is not a cloud service, users must apply the patch themselves.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-f5vp-w269-392g
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-55434"]
- Ecosystems
- ["Go"]
- Database Specific Severity
- MODERATE
- Cvss Version
- 3.1
Threat ID: 6a4c340227e9c797195f5e6a
Added to database: 07/06/2026, 23:02:26 UTC
Last enriched: 07/06/2026, 23:11:55 UTC
Last updated: 07/06/2026, 23:11:55 UTC
Views: 2
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.